German military engineers making foundation for block houses in Eastern front.

Block houses in Eastern front. German engineers digging the ground for the foundation of block houses. Men with axes cut tree logs for the block house. Men place tree logs in foundation and construct the block. A man works with bricks beneath the log roof. Men cover the rooftop of the houses with mud and straw bedding. A man with a horse comes out from the block house. German engineers engage in constructing rooftops.